Re: [PATCH v3 1/4] dt/bindings: Introduce the FSL QorIQ DPAA BMan

[Emil Medve <Emilian.Medve@Freescale.com>]

Hello Scott,


On 11/07/2014 02:19 AM, Scott Wood wrote:
> On Fri, 2014-11-07 at 02:14 -0600, Emil Medve wrote:
>> Hello Scott,
>>
>>
>> On 11/07/2014 01:34 AM, Scott Wood wrote:
>>> On Fri, 2014-11-07 at 01:31 -0600, Emil Medve wrote:
>>>> Hello Scott,
>>>>
>>>>
>>>> On 11/06/2014 03:49 PM, Scott Wood wrote:
>>>>> On Wed, 2014-11-05 at 09:18 -0600, Emil Medve wrote:
>>>>>> +Devices connected to a BMan instance via Direct Connect Portals (DCP) must link
>>>>>> +to the respective BMan instance
>>>>>> +
>>>>>> +- fsl,bman
>>>>>> +	Usage:		Required
>>>>>> +	Value type:	<prop-encoded-array>
>>>>>> +	Description:	List of phandle and DCP index pairs, to the BMan instance
>>>>>> +			to which this device is connected via the DCP
>>>>>
>>>>> Does software need the DCP index (though for QMan there do seem to be a
>>>>> few registers associated with each DCP)?  Where can I find that info in
>>>>> the manual?
>>>>
>>>> The DCP index helps describe the topology of the devices connected to
>>>> the B/QMan. One might be tempted to use some address to reference said
>>>> DCP, unfortunately the pertinent registers/bits for said DCP(s) are not
>>>> into a compact region. Look at the CCSR memory map for B/QMan
>>>>
>>>> In the QMan case things are marginally better. For each hardware portal
>>>> there are a handful of (vaguely named *DCx*, *DCPx* or *DCP*) registers
>>>> (configuration, performance monitoring and debugging). However, still
>>>> registers and bits spread here and there
>>>>
>>>> In the BMan case things are a bit worse as the registers names are less
>>>> friendly and still spread around
>>>>
>>>> Do you need specific names/offsets?
>>>
>>> My question about the manual wasn't rhetorical -- I tried to find this
>>> information and couldn't.
>>
>> I get that. As I said, the registers/bits are spread around in the CCSR
>> space of each block and not named excessively friendly. As such I hinted
>> for some search patterns to make it easier to find them. In order to
>> progress the review I'm willing to prepare a list. Just let me know
> 
> Could you point me to the section of the manual where this information
> is -- friendly or otherwise?  I saw the QMan direct connect portal
> registers.  I didn't see how to tell which <i> in DCPi_xxx goes with
> which device.

For QMan look into section '6.3.10 Direct Connect Portals (DCPs)'. The
BMan DCP assignment is the same


Cheers,